Figure 3: Immunohistochemical findings of retroperitoneal tumor showing positivity for (a) WT1; (100×); (b) PanCK; (200×); (c) CD99; (200×); (d) Inhibin; (200×); (e) CD56; (200×); (f) Desmin; (200×); (g) Epithelial membrane antigen; (200×); (h) Alfa fetoprotein; (200×)